Replacement ultraviolet lamp for Hanovia disinfection systems, catalogued under reference UVHABU0131. Medium-pressure UV lamps lose output steadily through life rather than failing outright, so they are replaced on elapsed running hours against the system’s dose record, not when they stop lighting. This reference belongs to the UVHA… coding used for Hanovia UV parts in integrator catalogues rather than to Hanovia’s own 1300xx lamp numbering, so if you hold a Hanovia parts list you may find the same lamp under a different number — quote both when ordering. Reference number 22120-1115.